/*
 * Copyright (C) 2024 Square, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package app.cash.zipline

import assertk.assertThat
import assertk.assertions.hasMessage
import kotlin.test.assertFailsWith
import kotlin.test.assertNotNull
import org.junit.Test

class LeakWatcherTest {
  @Test
  fun detectsLeakedObjects() {
    val leaked = Any()
    val leakWatcher = LeakWatcher {
      leaked
    }
    val assertionError = assertFailsWith<AssertionError> {
      leakWatcher.assertNotLeaked()
    }
    assertThat(assertionError).hasMessage("object was not garbage collected")
    assertNotNull(leaked) // Prevent a smart compiler from optimizing 'leaked' out.
  }

  @Test
  fun doesntDetectUnreferencedObjects() {
    val leakWatcher = LeakWatcher {
      Any()
    }
    leakWatcher.assertNotLeaked()
  }
}
